TY - JOUR
T1 - Durability of self-healing ultra-high-strength reinforced micro-concrete under freeze-thaw or chloride attack
AU - Pérez, Gloria
AU - Calvo, José Luis García
AU - Carballosa, Pedro
AU - Tian, Run
AU - Allegro, Virginia Rodriguez
AU - Erkizia, Edurne
AU - Gaitero, Juan Jose
AU - Guerrero, Ana
PY - 2017/12/1
Y1 - 2017/12/1
N2 - The durability of an innovative self-healing micro-concrete in aggressive environments simulated by freeze-thaw cycles and salt spray test is studied. Tests are conducted on an ultra-high-strength reinforced micro-concrete that incorporates an autonomous self-healing mechanism based on the reaction of an epoxy compound enclosed within silica microcapsules and amine functionalised silica nanoparticles distributed within the cementitious matrix. The effect of aggressive environments is analysed in the self-healing micro-concrete and in a reference micro-concrete stored for 28 d in laboratory conditions after cracking, for crack widths of 150 and 300 μm. The results of capillary water absorption tests, complemented by electron microscopy analysis, confirm the enhanced durability of the autonomously self-healed material in both the freeze-thaw and the salt spray tests, as compared to the reference micro-concrete. In conclusion, the innovative self-healing mechanism is expected to increase the service life of structures in humid, cold climates and chloride-containing environments.
AB - The durability of an innovative self-healing micro-concrete in aggressive environments simulated by freeze-thaw cycles and salt spray test is studied. Tests are conducted on an ultra-high-strength reinforced micro-concrete that incorporates an autonomous self-healing mechanism based on the reaction of an epoxy compound enclosed within silica microcapsules and amine functionalised silica nanoparticles distributed within the cementitious matrix. The effect of aggressive environments is analysed in the self-healing micro-concrete and in a reference micro-concrete stored for 28 d in laboratory conditions after cracking, for crack widths of 150 and 300 μm. The results of capillary water absorption tests, complemented by electron microscopy analysis, confirm the enhanced durability of the autonomously self-healed material in both the freeze-thaw and the salt spray tests, as compared to the reference micro-concrete. In conclusion, the innovative self-healing mechanism is expected to increase the service life of structures in humid, cold climates and chloride-containing environments.
UR - http://www.scopus.com/inward/record.url?scp=85029504546&partnerID=8YFLogxK
U2 - 10.1680/jmacr.17.00075
DO - 10.1680/jmacr.17.00075
M3 - Article
AN - SCOPUS:85029504546
SN - 0024-9831
VL - 69
SP - 1231
EP - 1242
JO - Magazine of Concrete Research
JF - Magazine of Concrete Research
IS - 23
ER -